StarWing schrieb:
On 10月18日, 上午12时50分, "Diez B. Roggisch" <de...@nospam.web.de> wrote:
StarWing schrieb:
On 10月17日, 下午9时54分, Arian Kuschki <arian.kusc...@googlemail.com>
wrote:
Hi all
this has been bugging me for a long time and I do not seem to be able to
understand what to do. I always have problems when dealing input text that
contains umlauts. Consider the following:
In [1]: import urllib
In [2]: f = urllib.urlopen("http://www.google.de/ig/api?weather=Muenchen";)
In [3]: xml = f.read()
In [4]: f.close()
In [5]: print xml
------> print(xml)
<?xml version="1.0"?><xml_api_reply version="1"><weather module_id="0"
tab_id="0" mobile_row="0" mobile_zipped="1" row="0"
section="0"><forecast_information><cit
y data="Munich, BY"/><postal_code data="Muenchen"/><latitude_e6
data=""/><longitude_e6 data=""/><forecast_date
data="2009-10-17"/><current_date_time data="2009-10
-17 14:20:00 +0000"/><unit_system
data="SI"/></forecast_information><current_conditions><condition data="Meistens
bew kt"/><temp_f data="43"/><temp_c data="6"/><h
umidity data="Feuchtigkeit: 87 %"/><icon
data="/ig/images/weather/mostly_cloudy.gif"/><wind_condition data="Wind: W mit
Windgeschwindigkeiten von 13 km/h"/></curr
ent_conditions><forecast_conditions><day_of_week data="Sa."/><low
data="1"/><high data="7"/><icon
data="/ig/images/weather/chance_of_rain.gif"/><condition data="V
ereinzelt Regen"/></forecast_conditions><forecast_conditions><day_of_week
data="So."/><low data="-1"/><high data="8"/><icon
data="/ig/images/weather/chance_of_sno
w.gif"/><condition data="Vereinzelt
Schnee"/></forecast_conditions><forecast_conditions><day_of_week
data="Mo."/><low data="-4"/><high data="8"/><icon data="/ig/i
mages/weather/mostly_sunny.gif"/><condition data="Teils
sonnig"/></forecast_conditions><forecast_conditions><day_of_week
data="Di."/><low data="0"/><high data="8"
/><icon data="/ig/images/weather/sunny.gif"/><condition
data="Klar"/></forecast_conditions></weather></xml_api_reply>
As you can see the umlauts in the XML are not displayed properly. When I want
to process this text (for example with xml.sax), I get error messages because
the parses can't read this.
I've tried to read up on this and there is a lot of information on the web, but
nothing seems to work for me. For example setting the coding to UTF like this:
# -*- coding: utf-8 -*- or using the decode() string method.
I always have this kind of problem when input contains umlauts, not just in
this case. My locale (on Ubuntu) is en_GB.UTF-8.
Cheers
Arian
try this?
# vim: set fencoding=utf-8:
import urllib
import xml.sax as sax, xml.sax.handler as handler
f = urllib.urlopen("http://www.google.de/ig/api?weather=Muenchen";)
xml = f.read()
xml = xml.decode("cp1252")
f.close()
class my_handler(handler.ContentHandler):
def startElement(self, name, attrs):
print "begin:", name, attrs
def endElement(self, name):
print "end:", name
sax.parseString(xml, my_handler())
This is wrong. XML is a *byte*-based format, which explicitly states
encodings. So decoding a byte-string to a unicode-object and then
passing it to a parser is not working in the very moment you have data that
- is outside your default-system-encoding (ususally ascii)
- the system-encoding and the declared decoding differ
Besides, I don't see where the whole SAX-stuff is supposed to do
anything the direct print and the decode() don't do - smells like
cargo-cult to me.
Diez
yes, XML is a *byte*-based format, and so as utf-8 and code-page
(cp936, cp1252, etc.). so usually XML will sign its coding at head.
but this didn't work now.
in Python2.6, sys.getdefaultcoding() return 'ascii', and I can't use
sys.setdefaultcoding(), and f.read() return a str. so it must be a
undecoded, byte-base format (i.e. raw XML data). so use the right code-
page to decode it is safe.(notice the webpage is google.de).
in Python3.1, read() returns a bytes object. so we *must* decode it,
nor we can't pass it into a parser.
You didn't get my point. A XML-parser only *takes* a byte-string.
Decoding is it's business. So your above last sentence is wrong.
Because regardless of the python-version, if you feed the parser a
unicode-object, python will first encode that to a byte-string, possibly
giving a UnicodeError (maybe this automated conversion has gone in Py3K,
but then you get a type-error instead).
So to make the above work (if one wants to parse the xml), the proper
thing to do would be
xml = xml.decode("cp1252").encode("utf-8")
and then feed that. Of course the really good thing would be to fix the
webpage, but that's beyond our capabilities I fear...
Diez
--
http://mail.python.org/mailman/listinfo/python-list
